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Finding the Fourth Proportional to 7,487.84, 11,216.28 and 3,580.40

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Solution

The fourth proportional to 7,487.84, 11,216.28 and 3,580.40 is: 5,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.84 : 11,216.28 = 3,580.40 : x
  2. Step 2: Convert to fraction form
    7,487.84/11,216.28 = 3,580.40/x
  3. Step 3: Cross multiply
    7,487.84x = 11,216.28 × 3,580.40
  4. Step 4: Simplify right side
    7,487.84x = 40,158,768.91
  5. Step 5: Solve for x
    x = 40,158,768.91/7,487.84
  6. Step 6: Final answer
    x = 5,363.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.